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SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	1 Months Ended			3 Months Ended		6 Months Ended
	Jul. 29, 2021 USD ($)	Apr. 30, 2021 USD ($)	Nov. 30, 2019 USD ($) home	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jan. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	May 31, 2020 USD ($)
Accounting policies
Notes receivable				$ 139,745		$ 139,745			$ 158,685
Allowance for credit losses				(698)		(698)			(693)
Notes receivable, net				139,047		139,047			157,992
Significant Accounting Policies
Total real estate, net				8,741,018		8,741,018			8,466,106
Gain on extinguishment of debt						(41,950)
Unpaid accrued interest				43,536		43,536			44,760
Note receivable interest income				2,000	$ 2,400	4,000	$ 5,000
Interest income, related party				0	0	0	0
Allocation of other comprehensive income/(loss)						64
Current income tax expense (benefit)						0
Net deferred tax assets/(liabilities)				(600)		(600)			(3,200)
Unrecognized tax benefit, accrued interest or penalties due to examination				0		0
Adjustment to rental income				700		5,800
Adjustment to income (loss)				100		500
Noncontrolling Interest
Significant Accounting Policies
Allocation of other comprehensive income/(loss)					100	100	(100)
Maximum
Significant Accounting Policies
Credit losses				100	$ 100	$ 100	$ 100
Maximum | Noncontrolling Interest
Significant Accounting Policies
Allocation of other comprehensive income/(loss)				$ 100
Bellevue, WA 259 Home Community
Significant Accounting Policies
Aggregate commitment on note receivable			$ 115,000
Number of apartment homes | home			259
Payment to acquire real estate	$ 170,000
Note due February 2021
Accounting policies
Notes receivable								$ 4,000	4,000	$ 4,000
Note due May 2022, One
Accounting policies
Note receivable interest rate				8.00%		8.00%
Notes receivable		$ 20,000		$ 20,000		$ 20,000			20,000
Significant Accounting Policies
Total real estate, net		25,000
Gain on extinguishment of debt		100
Unpaid accrued interest		$ 4,900
Note due May 2022, Two
Accounting policies
Note receivable interest rate				14.00%		14.00%
Notes receivable				$ 2,760		$ 2,760
Significant Accounting Policies
Aggregate commitment on note receivable				$ 2,800		$ 2,800
Note due October 2022
Accounting policies
Note receivable interest rate				4.75%		4.75%
Notes receivable				$ 115,000		$ 115,000			115,000
Note due October 2022 | Bellevue, WA 259 Home Community
Significant Accounting Policies
Aggregate commitment on note receivable			$ 115,000
Deposit made under purchase option agreement			10,000
Payment to acquire real estate			$ 170,000
Note due January 2023
Accounting policies
Note receivable interest rate				10.00%		10.00%
Notes receivable				$ 21,985		$ 21,985			$ 19,685
Significant Accounting Policies
Aggregate commitment on note receivable				22,000		22,000
Note maturity public capital threshold						5,000
Additional amount loaned						2,300
Multifamily tenant lease
Significant Accounting Policies
Increase in reserves				100		4,800
Retail tenant lease
Significant Accounting Policies
Increase in reserves				$ 700		$ 1,500

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